Acres of Non-Federal Grazed Forest Land, 1982

Description

This dot density map shows the total acres of 1982 Non-Federal grazed forest land. Dots are aggregated by and placed randomly within 8-digit hydrologic units. Each green dot represents 10,000 acres of grazed forest land. Areas with 95% or more Federal area are shaded gray. There were 66.3 million acres of non-Federal grazed forest land in the U.S. in 1982. Grazed forest is a sub-category of Forest Land.

Cautions for this Product:
This map may not be used to determine site- specific information. Within an 8-digit hydrologic unit, dot counts represent acreage totals correctly plus or minus one dot to account for remainders. Data are not collected on Federal land. Data are not available for Alaska or the Pacific Basin. Data for Puerto Rico and the U.S. Virgin Islands are aggregated by 6-digit hydrologic unit.

Sources

Source:National Resources Inventory, 1997Distributor: USDA-NRCS-RIADReliability:
NRI sample data are generally reliable at the 95% confidence interval for state and certain broad substate area analyses. Generally, analyses that aggregate data points by smaller geographic areas and/or more specific criteria result in fewer data points for each aggregation and therefore less reliable estimates. NRI maps reflect national patterns rather than site- specific information.

Layers

Definitions

Forest land:
A Land Cover/Use that is at least 10 percent stocked by single stemmed forest trees of any size which will be at least 4 meters (13 feet) tall at maturity. When viewed vertically, canopy cover is 25 percent or greater. Also included are areas bearing evidence of natural regeneration of tree cover (cutover forest or abandoned farmland) and not currently developed for nonforest use. For classification as forest land, an area must be at least one acre and 100 feet wide. [NRI-97]

Forest land, grazed:
Forest land that is being grazed by livestock and managed using range management principles and practices adapted to the forest ecosystem. [NCPM].

Non-Federal land:
Includes all land and water areas where the ownership is by private, municipal, county or parish, state, Indian tribal, individual trust, the Tennessee Valley Authority, or areas under temporary control of a Federal, state, county or municipal agency or government for foreclosure or nonpayment of taxes.